Pin stem clutch



July 25 1944- c. H. 'oKERHoLM ET AL 2,154,638l

PIN STEM CLUTCH Filed March l1, 1943 ATTORNEYS Patented July 25, 1944 PIN s'rEM CLUTCH Carl H. Okerholm, Lakewood,

and Attilio Pasquale, Providence, R. I., assignors, by mesne assignments, tog-American Metal Crafts Com-` pany, a corporation of Massachusetts Application March 11, 1943, Serial No. 473,824V

(C1. 2li-155) 9 Claims.

This invention relates to a device for gripping a pin stem or shank which may extend through the clothing from some emblem or button which it is desired should be mounted on a garment.

Devices of this character usually have the action mechanism formed of screw machine parts with the body being formed `oi two sheet stock parts rolled together, leaving a hollow central portion which houses the operating mechanism. Brass is usually used for the formation of a de vice of this character, but due to the scarcity of copper and` other metals, we desire to reduce to a large extent the metal heretofore used, and further we desire to provide a less expensive over all operation.

vide a device for gripping a pin stem or the like in which the actuatingk mechanism will be formed of sheet stock press formed parts.

Another object of the invention is to provide an actuating mechanism which may be produced more quickly than heretofore.

One of the objectsoi this invention is to pro- Another object of the invention is to provide v a construction which may be quickly and inexpensively assembled.v

With these and other objectsv in View, the invention consists of certain novel features of construction', as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a central' sectional view showing a pin or shank inserted in this device;

Fig. 2. isa sectional view aty right angles to the showing of Fig. 1;l

Fig. 3 is a sectional view on line 3-3 of Fig. 1;

Fig. 4 is a sectional view on line lI-- of Fig. l;

Fig. 5 is a perspective View of a portion of the cageior holding the rolls of the clutch;

Fig, 6 is an elevational view of the cage with a tubular part assembled therewith:-

Fig. '7 is a sectional View of the cap handle for manipulating the clutch; and

Fig. 8 is a sectional view of the lower part of the body or housing.,

In proceeding with this invention instead of using a screw machine. product formed from solid stock bored out to. shape the controller of the gripping elements, We have utilized roller type gripping elements and provided a sheet metal controller formed by blanking and bending by simple press operationsand have utilized certain resiliency in the foldingfor-bending of the controller to additionally Vfunction in the actuating mechanism. The controller serves to hold the gripping elements in proper position for reception of the pin stem `or shank to be gripped by theclutch and also' serves as a means for moving the gripping elements,-or releasing means, for conveniently limiting the movementl of the controller. f

With reference to the drawing lli` designates generally the lower-portion of the body member which consists lof a discY II drawn or -embossed to provide a cup 'I2 providing a generally rectangular recess I3 with.' tapered lside walls I4 and a bottom wall I5 provided with an `axial opening i6 for the reception of a pin stem or shank il. A ange I8 extends upwardly from the dise II and isshouldered as at I9 for the reception of the upper or othervportion 20' of the body, rlhis upper portion 2'0 consists of a domed disc 2i having laterally extend-ing edges 22 to rest'. upon the' shoulders IS' and be held in this position by the rolling inwardly, as at 23', of the upper edge of the flange.. L8. This provides a holiow shell-like body for retainingthe operating or actuating mechanism. The top 24 is raised from the portion 2li and is provided with a central opening 23 in axially aligned relation with the opening I6 in the bottom wall of the; opposite body portion. A 1 x i .The gripping means comprise, elements inthe form of rolls 26, see Figs.v 1 and 3, which are manipulated by a controller member designated 2T consisting ofv afsheet metal pieceA 28 folded into generally U-shape, as `shown in Fig` 5, with leg portions 29 bent'y downwardly from the arched bridge 30 to extend toward each 'other and then outwardly as at 3| in an arc shape to receivethe gripping element 26, the. arc being; of a diameter to revolvably support the gripping element. Each of these legs are centrally cut out as at 32 while the bridge 3S is cut-out as lat 33 to provide a central passage therethrough for the accommodation of theshank or pin'A stem. Arms 34 extend laterally from: the bridge r30 to engage the top portion of thefhodyyto limiet the axial movement of the controller member..

The opening 33 also serves to receive the tubular part 35 of the gripping means which has a'lange St extending Ibeneath the bridgev 3l)A of thev controller member.4 Th-is tubular portion 35 lextends outwardly from the body throughthe opening 25 and hasa cap 36V secured thereto, serving as a handle; The. cap is in two pieces there being a disk` rolled inwardly over the flanged edge of the tube 3l'. This tube Slhas 'a press fit with the upper edge 38 'of the tubular portion 35 whichA holds these parts assembled. Thus, a convenientl handle is provided outwardly or move away from each other so that when the handle 36 is engaged and the controller is moved axially away from the wall l these legs will tend to expand or move away from each other and will also move the gripping element 26 away from each other so as to release the pin stem or shank Y I1 which is positioned between them. The movement of the gripping means to released position is limitedby the arms 34 engaging the arched wallj2l so that the controller or rolls can never move completely out of the recess.

vvWhen the shank l1 is inserted it will itself move the rolls to a position where they may freely rotate by forcing the controller and the gripping element inwardly or upwardly as shown in Fig. 1. The pin stem in entering may do so easily by the rolling of the gripping elements and when these are moved to a positionso that they are .l

free to turn they serve as an easy means for extracting the shank from position- Wev claim.

1. A pinl stem clutch comprising a body provided with a recess having tapered guiding surf faces and a bottom Wall with an axial opening therethrough for the reception of a pin stem, axially movable gripping means having a portion located in said recess and comprising a pair of ,gripping elements engaging saidtapered surfaces to be moved toward each other by the surfaces as vtheymove toward said bottom wall, a controllingmember formed of sheet material and folded into substantially inverted U-shape to have its leg portions disposed between said gripif;

ping elements on opposite sides of said axial opening with the end portion of each leg extending outwardly to engage and support one of said ,elements to diametrically locate said elements on opposite sides of the axis of said opening and for movementof .said elements axially away from said bottom wall whereby said elements may move away'from each other.

. .2..A pin stem clutch comprising a body provided with a recess having tapered guiding surfaces and a bottom wall with an axial opening therethroughfor the reception of a pin stem,

axially movable gripping means having a portion located inl said recess and comprising a pair of gripping elements engaging said tapered surfaces to be moved toward eachother by the surfaces -as they move toward said bottom wall, a controlling member formed of sheet material and folded into substantially inverted U-shape to have its ments on opposite sides of said axial opening with the end portion of each leg extending outwardly to engage and support one of said elements to ,diametrically locate said elements on opposite vleg portions disposed between said gripping elesides of the axis of said opening and for moveil' mentA of said elements axially away from said .bottom wall whereby said elements may move -away from each other and a. spring engaging said `member to move it toward said wall.

3. A pin stem clutch comprising a body provided with a recess having tapered guiding surfaces and a bottom Wall with an axial opening therethrough for the reception of a pin stem, axially movable gripping means having a portion located in said recess and comprising a pair of gripping elements engaging said tapered surfaces to be moved toward each other by the surfaces as they move toward said bottom wall, a controlling member formed of resilient sheet material and folded into substantially inverted U-shape to have its leg portions confined and tending to spread apart and disposed between said gripping elements on opposite sides of said axial opening with the end portion of each leg extending outwardly to engage and support one of said elements to diametrically locate said elements on opposite sides of the axis of said opening and tending to spread the elements apart and for movement of said elements axially away from said bottom wall whereby said elements are moved away from each other.

4. A pin stem clutch comprising a body provided with a recess having tapered guiding surfaces and a bottom wall with an axial opening therethrough for the reception of a pin stem, axially movable gripping means having a portion located in said recess and comprising a pair of gripping elements engaging said tapered surfaces to be moved toward each other by the surfaces as they move toward said bottom wall, a controlling member formed of resilient sheet material folded into substantially inverted U-shape to have its leg portions confined and tending to spread apart and disposed between said gripping elements on opposite sides of said axial opening with the end portion of each leg extending outwardly to engage and support one of said elements to diametrically locate said elements on opposite sides of the axis of said opening and tending to spread the elements apart for movement of said elements axially away from said end wall whereby said elements are moved away from each other, and a spring engaging said member to move it toward said wall.

5. A finding for pin stem clutch comprising an inverted U-shape sheet metal member having legs and means on the end portion of each leg for supporting Y gripping elements.

6. A nding for pin stem clutch comprising an inverted U-shape sheet metal member having legs, means on the end portion of each leg for supporting gripping elements and a Ytubular part axially extending therefrom into which the pin stem may extend.

7. A nding for pin stem clutch comprising an inverted U-shape sheet. metal member having legs arched. outwardly to provide bearings for roller gripping elements.

8. A finding for pin stem clutch comprising an inverted U-shape sheet metal member having legs arched outwardly to provide bearings for roller gripping elements and centrally recessed to receive a pin stem axially therethrough.

9. A finding for pin stem clutch'comprising an inverted U-shape sheet metal member having legs arched outwardly to provide bearings for roller gripping elements and centrally recessed to receive a pin stem axially therethrough and a tubular part axially extending therefrom into which the pin stem may extend.

CARL H. OKERHOLM. AlIILIO PASQUALE. f 

